What to Do If Your Dog Is Having an Allergic Reaction

Mild Allergic Reaction vs. Anaphylaxis

Knowing the difference is critical — one can be monitored at home, the other is a life-threatening emergency.

Signs of Mild Allergic Reaction

• Hives (raised, itchy bumps under the fur)
• Mild facial swelling — puffy eyes or muzzle
• Redness of the skin
• Itching and scratching
• Mild vomiting or diarrhea

Signs of Anaphylaxis (Emergency)

• Severe facial swelling — especially throat or muzzle
• Difficulty breathing or wheezing
• Pale or white gums
• Vomiting and diarrhea together
• Collapse or extreme weakness
• Rapid heart rate

If your dog shows ANY signs of anaphylaxis — go to the emergency vet immediately. Anaphylaxis can be fatal within minutes.

What to Do for a Mild Reaction

1. Remove the trigger if known (stop the food, remove the insect stinger, wash off the substance)
2. Call your vet for guidance on whether antihistamines are appropriate
3. Monitor closely for 1–2 hours for any worsening
4. Go to the vet if symptoms worsen or don't improve

What to Do for Anaphylaxis

1. Go to the emergency vet immediately — do not wait
2. Call ahead so they can prepare epinephrine
3. Keep your dog as calm and still as possible during transport

Common Triggers for Allergic Reactions in Dogs

• Insect stings (bees, wasps, fire ants)
• Vaccines (reactions typically within 30–60 minutes)
• Medications
• Foods (less common for acute reactions)
• Contact with plants or chemicals

After Treatment

Once your dog has had an anaphylactic reaction, ask your vet about keeping an epinephrine auto-injector (EpiPen) on hand for future emergencies. Identify and avoid the trigger going forward.

🧰 Recommended: EVERLIT Pet Medic First Aid Kit (95 Pcs) — Vet-approved emergency kit. Keep one at home and one in the car.